I Yam what I Yam.

As the weather cools down through Autumn and Winter a lot of tuber producing plants start to die back which means… HARVESTING TIME!!!

An interesting one I dug up this winter was my Greater Yam (Dioscoria alata). There are a very large variety yams, over 850 species, but the most commonly grown is the Greater Yam. The vine grows to 2.5m wide and 3m tall so likes to climb a tree or sturdy frame, a bamboo tripod over a well composted mound works well. Its dense, attractive heart-shaped foliage provided an excellent breeding ground for Praying mantis’ over the summer which are beneficial predators of grasshoppers and locusts.

The tubers of the Greater Yam have a course brown skin and either red or white flesh. One plant can produce one to a number of tubers ranging in size depending on situation, in the ideal conditions tubers have been known to reach over 60kg! Provide the plant with ample water through its growing season in the warm weather for best results and harvest in late Autumn.

I found removing the tubers safely from the ground can be quite tricky as they can run dense and deep…. just think of the bonza harvest! If any are damaged during extraction you can remove the damaged pieces and let the clean cuts heal in a sheltered dry place. These pieces can be grown into new plants! I ended up with about 15kg of Yams, plenty of large ones to eat and small ones to propagate for next season.

As far as storage and consumption; yams heal well and store for a long while in a cool dry place. Once peeled, the Greater Yam can be boiled then pounded into a kind of dough or cut into chips and fried. I found the taste quite like a nutty potato… the texture being far from potato but still enjoyable as chips. I’m sure it’d be nice cut thinly and dried as crisps or…. anything! Calls for experimentation!

Rosella Jam (Not the bird)

Rosella Fruit

The particular Rosella I refer to here is a fast-growing annual woody sub-shrub native to tropical West-Africa by the scientific name Hibiscus sabradiffa. Being a Hibiscus, the Rosella harbours masses of beige hibiscus flowers with scarlet throats on scarlet stems bringing much colour to the garden. In addition to its aesthetic appeal, Rosella seed pods are enclosed by a fleshy set of sepals which can be boiled to make delicious jams, drinks and sweets. The stems also yield a fibre which is useful as string in the garden (very cool!). The Rosella prefers warm climates but do quite well in temperate zones. Plant directly where you want it to grow providing the spot has quite good drainage, otherwise you might find your plant rotting and succumbing to mould attack.

If your Rosella is doing well and looking healthy, wait a while before harvesting to allow as many buds to flower and seeds to mature as possible. While this is happening the scarlet sepals around the pods should only be getting fatter and juicier. From seed to harvest it should take around 6 months, by which time the whole plant will be reaching the end of its life span.

Once ready, cut all of the bright scarlet pods off the stems and take them somewhere for sorting.

Rosella Harvest

The scarlet sepals including the fleshy base-plate surrounding each of the seed pods can be simply broken away from the pods and separated for cooking. The seed pods can be dried and the seed stored for next season or added to the jam making process while fresh for their high levels of pectin (jam setting agent). I used bought pectin for the jam as I wanted to keep the seeds viable for next years crop.

Rosella sepals removed from pods.

Really its all quite simple: Peel and core roughly as many granny smith apples as you feel you need to match the volume of Rosella sepals you have. Chop the apples and Rosella up into smallish pieces and put into a deep pan with as much water as you need to just cover the fruit. Boil on stove top till its all soft and add your sugar and pectin. Add as much castor sugar as you have fruit. Keep stirring to make sure the bottom doesn’t burn and simmer till a cooled spoon of your substance maintains its shape and stick to the spoon turned upside down. Add hot to sterilised jars with sealing pop-top lids… coffee jars do not suffice as they rely on cardboard to form a seal.

Then you have Rosella (& Apple) Jam! YUM!! From the harvest of a single plant I made 5 jars of jam. Not bad for an experiment, and said jam got an enthusiastic ‘seal of approval’ from all whom tried it. 🙂

Rosella sepals ready to cook.

Summer Workshops

This summer Tree Frog will be putting on a series of workshops in Newcastle and out on a fantastic “No-commitment permaculture lifestyle” property near the Watagans, 45 min from Newcastle and just over an hour from Sydney.

Email Chris at TreeFrogPermaculture@gmail.com to join our mailing list, and add us on Facebook for regular updates.

Permaculture Links

Hey all,

Here’s some permaculture links to keep you amused and informed!


Backyard Aquaponics


Aquaponics Australia



Backyard Poultry (Australian Site)


Chicken Breed Chart:



Diggers Garden Club:


Eden Seeds:


Green Harvest:


Plants and Trees:

Trees in Newcastle – 252 Parry St, Hamilton


Daley’s Online Nursery:


Community / Permaculture Groups:

Permaculture Hunter Region:


Transition Towns Newcastle:


Hunter Permaculture:


Permaculture TV:


Permaculture Research Institute (Geoff Lawton):


Permaculture College of Australia (Robyn Francis):


Regenerative Agriculture (Darren Doherty):


Taranaki Farm (Bill Mollison)


Milkwood Permaculture


Tree Frog Permaculture (Us 🙂


Community Gardens:

Sandhills – Newcastle East:


Warners Bay


Tighes Hill:


Church St – Mayfield:


Greening Centre – Kotarah: